In mid-1980, Charles began to pay frequent visits to the Leisure Village retirement community in Fox Lake, where his wife's mother, 69-year-old Marion Mueller, lived with her own mother, 89-year-old Mary Lambert. When doing so, he would often bring little gifts, varying from jewelry and trinkets, and would often dine with them whenever he could. During these visits, he gradually convinced Lambert to transfer her financial assets to her daughter, completely bypassing her other daughter and son. Then, unbeknownst to anyone from his family, he contacted the operator of a metal plating company in
Elkhorn, Wisconsin, to whom he sometimes sold scrap
zinc, ostensibly to ask what would be the most efficient method to get rid of some "pests" in his home. On the man's recommendation, Albanese was supplied with arsenic and instructed how to use it, and over the next few months, he administered small doses of the poison in Mueller's food. Her cause of death was listed as a heart attack. Only twelve days later, Lambert was taken by a similar illness and rushed to the St. Therese Hospital in
Waukegan, where she died from what was deemed "natural causes". The sudden death of the two women sparked fears in the locals, as well as rumors that the village's food and water supply had been contaminated. In response, the Lake County Health Department launched a full-scale investigation in both the sewage system and the restaurants, but all tests returned negative. Due to the lack of any suspicious substances or activity, the investigation was concluded and life slowly returned to normal. Owing to their deaths, Mueller and Lambert's estates, which amounted to around $150,000, were transferred to Albanese's wife Virginia. Not long after the tragedy, Albanese attended a meeting with his father on September 4, 1980, during which an argument broke out between the two, with Michael Sr. saying that he no longer wanted him in the company. A few days later, the elder Albanese changed his stance and simply demoted him to treasurer. In what appeared to be an act of gratitude, Albanese began bringing home-made cookies to his father at work, as well as snacks for his younger brother. Just four days after he began doing so, Michael Jr. had to be hospitalized due to severe vomiting and nausea. In the following months, both Michael Sr. and Michael Jr. were hospitalized on several occasions due to violent illnesses, with the former succumbing to his ailments on May 16, 1981, aged 69. With the death of his father, Albanese inherited his $267,373 estate as well as tighter control over the family business. ==Investigation and arrest==